Mixing-machine.



A. J. GROPP. MIXING MAGHINE.

APPLICATION IILEI) AUG. 8, 1908.

Patented Jan 18,1910.

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MIXING MACHINE.

-APPLIOATION rum) we. 2, 190a.

Patented Jan. 18, 1910.

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' A. J; GROPP.

MIXING MACHINE. APPLIOATION FILED AUG.'8, 1908.

Patented Jan. 18,1910.

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amino smrns 'PATENT OFFICE ANDREW J'. CROPP, OF CHICAGO, ILLINQI S, 'ASSIGNOR TO GROPP CONGRETE MA CHINERY COMPANY; OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MIXING-MACHINE.

Specification of Letters Patent. Patented J 3,11, 18, 1910, I

Applicationfiled AugustS, 1908,. Serial No. 447,637.

objects to provide simple, efficient and dura ble means for thoroughly mixing or intermmglmg ingredients of various klnds to be used for different purposes, but more particularly for mixing ingredients or materials employed for the production of concrete for any of the usual purposes.

Other objects and advantages of the invention will. be disclosed in the subjoined description.

In order to enable others skilledin the art to which my invention pertains, to make'and use the same, 1 W111 now proceed to describe it, referring to the acoompanylng drawings, in wh1ch Figure 1 is a view in elevation of the dis charging end of the mixer, showlng the door,

by dotted lines, to the discharging chute in its open or elevated position; Fig. 2 is a view in elevation of the receiving or charging end of the machine; Fig. 3 is a detached perspective view of the discharging chute and the door therefor, showing the latter in a partially raised position; Fig. 4 is a perspective view of a portion of the segmental guard and keeper for thehandle used for raising and lowering the. door of the chute; Fig. 5 is an inner perspective view of a portion of the disohargingend of the rotatable drum; Fig. 6 is a horizontal sectional view taken on line 66 of Fig. 2; Fig. 7 is a plan view of Fig. 1 showing a portion of the gear bands broken away and illustrating the parts by dotted lines in the positions they will occupy when the mixer is being discharged; Fig. 8 is a longitudinal sectional view taken on line 8-8 of Fig. 7 looking in the direction indicated by the arrows; Fig. 9 is a detail view of a portion of the parti tion of the drum, showing the flanges thereon to which the deflectors for the material is secured; Fig. 10 is an inner perspective view of a portion of the partition, showing the deflectors or blades secured to the flanges thereof; Fig. 11 is a view in elevation of they receiving end of the mixing drum, showing of the mixing drum or receptacle.

a modification in the construction and arrangement of the deflectors or blades Fig. 12 is aplan sectional view of a portionof the drum, showing a modified form of de flectors; Fig. 13 is a detached view of one of the deflectors of the modified construction; and Fig. 14 is a perspective view of a portion ofthe partition of thedrum, illustrating another modification in the construction of the deflectors.

Like numerals of reference, refer to corresponding parts throughout the different views of the drawings.

The reference numeral 20 designates the mixing receptacle, which is in the form of a drum or cylinder and may be made of any suitable size and material, and has circumferentially mounted on its outer surface near each of its ends a band or circular gear 21 Whichmesh with gears 22 mounted on a driving-shaft 23 which is suitably j ournaled on a supporting-frame Qt, of the ordinary orany preferred construction, and which shaft may be driven by any suitable means. Each of the gear-bands or rings 21 isprovidedwith. a circular or band-like portion 25; which are adapted torest on rollers 26 journaled on the upper portion of the sup' portingiframe 24 and in pairs on each side This drum or receptacle has at its receiving or charging end a circular disk 27 with a central opening therein and at its other or discharging end a head 28 which is provided at about its center with a segmental opening 29 for the reception of the discharging chute 3 0 which extends some distance into, the nterior of the drum and preferably proects a slight distance outwardly from the head 28, as is clearly shown in Figs. 6 and 7 of the. drawings.

Secured to the outer surface of the head 2.8 near one. of the ends of the opening 29 the discharging. chute, which consists of a curved p1ece'3'1 having near one of its ends a recess 32 (see Fig. 4) and a correspond- :ingly curved strap or portion 33 connected at its ends to the piece 31, yet so as to be held at a distance therefrom. Located within the drum 20 ata suitable distance from therein a segmental .keeper and guard [for the. handle used forraising thedoor for the disk'27 at the charging end thereof lSfit partition 34 which is secured at its outer edge to the inner periphery of the drumand is provided with a central opening 35 of considerably less diameter than the opening 27 of the said disk 27.

Journaled at one of its ends on the partition 34 near the opening 35 therein and at its other end in the head 28 near one end of the opening 29 therein is a shaft 36 which has on its outer end a handle 37 which is extended between the members 31 and 33 of the keeper and guard therefor, and is adapted to engage the recess 32 in the member 31 when it is desired to hold the door 37 in its closed position, which door is mounted on the shaft 36 and has at its edge adjacent to the inner end of the chute 30 a flange 38 which is adapted to close the inner end of the chute when the door is in its lowered position. and to assist the door in guiding the material to the chute when the door is in its raised position, as shown by dotted lines in Fig. 1 of the drawings. As shown,

the chute 30 is segmental or substantially semicircular in cross -seetion and tapers from its inner end outwardly, and may be supported at one of its edges on the shaft 36 to which it is loosely connected, so that said shaft may be turned independently thereof. The enlarged or outer portion of the chute 30 is located in and extends through the segmental opening 29 in the head 28, and may be secured thereto in any suitable manner, thus forming out of said head a support for the chute which will prevent it rocking. The partition 34, which as before stated is located at a suitable distance within the drum 20 from the disk 27 thereof, is provided with a series of openings 39 which are preferably located at equal distances apart and in the present instance are shown as being produced by means of radial incisions 40 and incisions 41 at right angles to the inner ends of the first-named incisions, thereby forming flanges 42 and 43 which are deflected in opposite directions and produce the openings 39 above referred to.

As shown in Fig. 9, the incisions or slots 40 in the partition 34 extend from the outer edge thereof inwardly and communicate with the incisions or slots 41 at their inner ends. Secured at one of its ends to each of the flanges 42 is a blade 44 which has its other end secured to the inner surface of the disk 27 and said blades are located diagonally across the space between the disk 27 and the partition 34, as is clearly shown in Figs. 2, 6 and 8 of the drawings. Secured to each of the flanges 43 on the partition 34,

which is deflected inwardly as shown, and also to the inner surface of the drum 20, is a blade 45, which blades and the flanges 43 to which they are secured have substantially the same diagonal inclination as the blades 44 and the flanges 42 to which the lastnamed blades are secured. Secured to the free or inner edge of each of the blades or deflectors 45 and to the inner surface of the partition 34 is a plate 46, which, together with said parts, form pockets. Mounted on the inner surface of the drum 20 and about midway between the disk 27 and head 28, and diametrically opposite each other, are two V-shaped plows 47 each of which presents its apex in the direction of the rotation of the drum. Each of these plows is secured to the drum 20 and supported at a slight distance from the inner surface thereof by means of a series of brackets 48, one of which is secured at about the middle or apex of the plow and another one at each 0 the rear portions or ends thereof. While I have shown two of such plows and will ordinarily use said number, yet I do not desire to be limited thereto, as I may employ one or more of the same. Secured to the inner surface of the head 28 and to the drum 20 at a point near the shaft 36 is a plate 49 against which the door 37-" of the chute 30 will rest when in its raised position as shown by dotted lines in Figs. 1 and 7 and by continuous lines in Fig. 8 of the drawings. EX- tended diagonally and partially across the inner surface of the drum and secured thereto is a plate 50 which, as shown by dotted lines in Fig. 7 and by continuous lines in Fig. 8, projects inwardly from the drum 20, and extends from the inner edge of the plate 49 diagonally to near the inner end of one of the deflectors on the inner surface of the partition 34 at the charging end of the cylinder. On the inner surface of the head 28 and on the inner surface of the drum 20 at a suitable point is secured a plate 51 which projects inwardly of the drum and toward the discharging chute, and also extends inwardly toward the disk 27 in the charging end of the drum.

In Figs. 11, 12 and 13 of the drawings is shown modifications in the construction of the drum and of the deflectors, which consists in providing the drum 20 with a disk 27 as in the other construction, but omitting the partition 34. In this modified construetion the drum 20 has secured thereto near the disk 27 a series of plates 52 which are extended diagonally from points at suitable distances apart inwardly from the disk 27 to the inner surface of said disk and may have their outer ends secured thereto by any suitable means. These plates, as shown in Figs. 12 and 13, are spaced apart and have substantially the same diagonal inclination toward the interior of the drum, and have their outer portions cut away as at 53, so as to be of about the same width as that of the disk 27 from the o )enin therein to its 1 a l b periphery, while their inner portions are widened and provided with curved parts 54, as will be clearly understood by reference to Fig. 13 of the drawings.

In Fig. 14 of the drawings I have shown an, we

still another modification in the construction of the inwardly directing deflectors *or plates for the material, which consists in providing the partition 84 with a series of openings 39, as in the first described construction, and flanges 42 and 43 and plates at and 45 secured thereto, respectively, which plates and flanges have substantially the same diagonal inclination, but in the modification now underconsideration the plates 46, which consists in forming the pockets above referred to and clearly shown in Figs. 6 and 10, are'omitted.

From the foregoing and by reference to the drawings it willbe clearly understood and readily seen that the drum or mixer may be rotated by means of power supplied to the driving-shaft 23, the rotation of which will, through the instrumentality of the gears 22 and band-gears 21, impart rotary movement to the drum, which, as before stated, is supported by means of the band extensions 25 on the rollers 26 -which are mounted on a suitable supportingframe. As the front or receiving end of the drum is provided with the disk 27 having the central opening 27 therein, it is apparent thatthe material, such as sand, gravel, crushed stone and cement may be dumped into the drum over the edge of the disk 27 from wheel-barrows trundled along the supporting-frame or otherwise. When the material shall have been placed into the drum over the disk27, and when the partition 84, is employed, it is apparent that the material will be caused, in the rotation oif the drum, to pass through the openings 39 in said partition by reason of the deflector plates l and 45', and will be directed diagonally toward the middle of the drum where it will be separated and a portion thrown toward one head of the drum and apart toward the other head thereofby means of the V shaped plows 47, which, as before stated, have their points or apexes presented in the direction of the rotation of the drums In this operation the plates 46 which, in conjunction with the partition 34; and deflector plates 4:5 form pockets, willserve to -somewhat retard or retain the material between the plates 45 and partition 34 until-the material has been carriedupwardly by the rotating drum, when, by reason of the gravity of the material, it will be'discharged from said positions inwardly toward the plows, which act thereon, as above described, lVhile the mixing of the material is thus carried on the door 37 to the 'chiite may be,

held in its closed position by placing the handle 37 in the recess 82 of the keeper for said handle, and when it is desired that the material may be discharged from the drum the door 37 may be raisedto the aosition shown by dotted "lines in Figs. 1 and when it is apparent that its outer portion will rest froii1"t'he diagonally disposed plate 50' which will accumulate materialthereon in the rotation of the drum.

\Vhen the modlhed constructions shown in Figs. llvto 14, inclusive, and above-(le scribed, are employed, substantially the same operation is performed. 1

By reference to the drawings it will. be

seen that the chute 30 is se mental in crosssection and is tapered inwardly, and that the door 37 has its free end cut away to correspond with the taper of the chute and also to correspond with the cut away portion" of the inwardly extending plate 49 (see Figs. 5 andS of the drawings.) By thus forming the "chute and door it is apparent that in the rotation of the drum the material will not clogon the door, that is to say, the reduced portion of the door will present a very small area for any of the material to lodge on, thus enabling the door to be easily operated and to be made of lighter material, and also relieving it, as well as its keeper, of great strain. Y Y

I hereby'disclaim the following claim, towit: In a mixer, in combination, a revoluble drum, means therein to agitate and mix the material, a continuous series of circularly arranged charging pockets located at one end of the drum within its cylindrical wall and closed at their outer ends, the open in-' lets of thepockets being turned toward the axis ofithe drum, a circular head having its periphery contacting with the tops of the pocket walls and set in from the adjacent end of the drum, and means to introduce material to the inlets of the pockets outside of said head. I

Having thus fully described my invention, what I claim as new, and desire to secure by Letters-Patent, is-

1. The rotary mixing receptacle having a centrally apertured disk atits receiving end and provided with an opening at about the center of'its other end, means to direct the material inwardly of the receptacle from the disk thereof, an inwardly tapered dischute and having at its inner port-ion a transversely disposed flange.

2. The rotary mixing receptacle having a centrally apertured disk at its receiving end and another at its discharging end provided with an opening'at about its center, means to direct the material inwardly of the receptacle from the disk thereof, a discharge chute located in the opening of the disk at the discharging end of the receptacle and extended into the latter, a door pivotally mounted within the receptacle near one side of the chute and having at its inner edge a flange, a plate secured to the receptacle at its discharging end and extended radially thereinto within the path of the door, and another plate diagonally disposed from the last named plate partially across the inner surface of the receptacle.

3. The rotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, means to direct the material inwardly of the receptacle from the disk thereof, a discharge-chute located in the opening of the discharge disk and extended into the receptacle, a door pivotally mounted in the receptacle near one side of the chute, a diagonally disposed plate secured to the inner surface of the receptacle, and one or more V-shaped plows mounted on the inner surface of the receptacle about midway between its ends.

4. The rotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, spaced apart and diagonally disposed deflector blades secured to the inner surface of the receptacle and extended inwardly from the disk thereof, a discharge chute located in the opening of the discharging end and extended into the receptacle, a door pivotally mounted within the receptacle near one side of the chute, a plate secured to the receptacle at its discharging end and extended radially there into within the path of the door, another plate diagonally disposed from the lastnamed plate partially across the inner surface of the receptacle, and means to hold the door in its closed position.

5. The rotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, a centrally apertured circumferential partition located within the receptacle at a distance from the disk thereof and having openings, a series of deflector blades diagonally disposed between the partition and disk at one side of the openings in the former, a series of diagonally disposed deflector blades extended inwardly from the other sides of the openings in said partition, a discharge chute located in the opening of the discharging end and extended into the receptacle, a door pivotally mounted within the receptacle near one side of the chute and adapted to open and close the same and to assist in guiding the material thereto when in its opened position, one or more V-shaped plows mounted on the inner surface of the receptacle about midway between its ends, and a plate diagonally disposed partially across the inner surface of thereceptacle from the path of the door.

(3. The rotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, a circumferential partition located within the receptacle at a distance from the disk thereof and having openings, a series of deflector blades diagonally disposed between the partition and dlsk at one side of the openings in the former, a series of diagonally disposed deflector blades extended inwardly from the other sides of the openings in said partition, a discharge chute located in the opening of the discharging end and extended into the receptacle, a door pivotally mounted within the receptacle near one side of the chute, a plate secured to the receptacle at its discharging end and extended radially thereinto within the path of the door, another plate diagonally disposed from the last-named plate partially across the inner surface of the receptacle, and means to hold the door in its closed position.

7. The rotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, spaced apart and diagonally disposed deflector blades secured to the inner surface of the receptacle and extended inwardly from the disk thereof, a discharge chute located in the opening of the discharging end and extended into the receptacle, a door pivotally mounted within the receptacle near one side of the chute and having at its inner edge a flange, a plate secured to the receptacle at its discharging end and extended radially thereinto-within the path of the door, and another plate diagonally disposed from the last-named plate partially across the inner surface of the receptacle.

8. Therotary mixing receptacle having a centrally apertured disk at its receiving end and provided with an opening at about the center of its other end, a circumferential partition located within the receptacle at a distance from the disk thereof and having openings, a series of deflector blades diagonally disposed between the partition and disk at one side of the openings in the former, a series of diagonally disposed deflector blades extended inwardly from the other sides of the openings in said partition, a plate secured to the inner surface of the partition at the inner part of each of the openings therein and to each of the deflector blades extending inwardly from the partition to form pockets, a discharge chute located in the opening of the discharging end of the receptacle and extended into the same, a door pivotally mounted within the receptacle near one side of the chute, a plate sccured to the receptacle at its discharging end and extended radially thereinto within the path of the door, and another plate diagonally disposed from the last-named plate partially across the surface of the receptacle.

9. The rotary mixing receptacle having at its receiving end a charging device consisting of a centrally apertured disk secured to the receptacle, and a series of blades extended at their outer ends. from the disk inwardly and diagonally with respect to the receptacle for a short distance from the disk for the purpose of directing the material into the receptacle, said blades having their portions adjacent to the disk of sub stantially the same width as said disk from the opening therein to its periphery and their inner portions widened.

10. The rotary mixing receptacle having a centrally apertured disk at its receiving end, a circumferential partition located within the receptacle at a distance from the disk thereof and having openings therein, a series of deflector blades diagonally disposed between the partition and disk and at one side of the openings in the former, and a series of diagonally disposed deflector blades extended inwardly from the other sides of the openings in said partition.

11. The rotary mixing receptacle having a centrally apertured disk at its receiving end, a circumferential partition located within the. receptacle at a distance from the disk thereof and having openings, a series of deflector blades diagonally disposed be tween the partition and disk and at one side of the openings in the former, a series of diagonally disposed deflector blades extended inwardly from the other sides of the openings in said partition, and a plate secured to the inner surface of the partition at the inner end of each of the openings therein and to the inwardly extending deflector blades to form pockets.

12. The rotary mixing receptacle having an opening in its discharging end, a chute located in said opening and extended into the receptacle, a door pivotally mounted within the receptacle and adapted to open and close the chute and to assist in guiding the material thereto, and a plate secured to the receptacle at its discharging end and extended radially thereinto within the path of the door.

13. The rotaryinixing receptacle having an opening in its discharging end, a chute located in said opening and extended an opening in its discharging end, a chute located in said opening and extended into the receptacle, a door pivotally mounted within the receptacle near one side of the chute and having at its inner edge a flange, a plate secured to the receptacle at its discharging end and extended radially thereinto within the path of the door.

15. In a mixer, in combination, a revo luble'drum having an apertured disk at its receiving end, means within the drum to agitate and mix the material, a continuous series of. circularly arranged charging pockets located at one end of the drum within its cylindrical wall and closed at their outer ends and having their outer portions ofsubstantially the same width as the .said disk from the opening therein to its periphery and their inner portions widened, and means to introduce material to the inlets of the pockets. y

16. The rotary mixing receptacle having an opening in its discharge end, a tapered chute segmental in cross-section located in said opening and having its reduced end extended into the receptacle, a door pivotally mounted within the receptacle and adapted to open and close the chute and having its free end cut away to correspond with the taper of the chute, and a plate secured to the receptacle at its discharging end and extended radially thereint-o within the path of the door and having its free end cut away to correspond with the cut away portion of the door.

. ANDREW J. CROPP.

Witnesses:

CHAs. O. TILLMAN, M. A. NYMAN. 

